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Spin wave dispersion relation in Sr2Cu3O4Cl2 lattice structure

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Perfluorophenyl-Phenyl Interactions in the Crystallization and Topochemical Polymerization of Triacetylene Monomers

Holger Frauenrath, Rui Xu

A series of symmetrically and unsymmetrically substituted octa-2,4,6-triyne-1,8-diol derivatives with benzoyl, 4-dodecyloxybenzoyl, as well as perfluorobenzoyl substituents were prepared and investigated with respect to their crystal structures and topoche ...

2009

X-ray diffraction (XRD) techniques are widely used in determining crystallographic orientations. In this paper we describe a two-step method to determine the three-dimensional orientations of ferroelectric single crystals based on an improved rotating orie ...

2009

Off-axis texture in nanostructured Ti1-xAlxN thin films

Alireza Karimi

Standard theta-2 theta and pole figure X-ray diffraction techniques were used to study structural properties and preferred orientation of nanostructured TiAIN thin films prepared using cathodic are deposition. Systematic collection of reflections from latt ...

R Deposition2008

Microstructure of precipitates and magnetic domain structure in an annealed Co38Ni33Al29 shape memory alloy

Barbora Bártová

The microstructure of a Co38Ni33Al29 ferromagnetic shape memory alloy was determined by conventional transmission electron microscopy (TEM), electron diffraction studies together with advanced microscopy techniques and in situ Lorentz microscopy. Rod-like ...

2008

Automatic lattice determination for two-dimensional crystal images

Henning Paul-Julius Stahlberg

Electron crystallography determines the structure of membrane proteins and other periodic samples by recording either images or diffraction patterns. Computer processing of recorded images requires the determination of the reciprocal lattice parameters in ...

Elsevier BV2007

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We investigate the presence of secondary phases in La-doped Bi-2201 thin films grown by laser ablation. The cation ratios in the target material, the oxygen pressure, and the substrate temperature during the deposition are the main parameters determining t ...

2007

Microemulsion mediated synthesis of nanocrystalline (K-x,Na1-x)NbO3 powders

Arnaud Magrez

The present study reports on the synthesis of nanocrystalline (K-x,Na1-x)NbO3 powders prepared via microemulsion mediated hydrolytic decomposition of mixed alkoxide solutions. Compositions with different K/Na ratios ranging between the two end members KNbO ...

2005

Cooperative Jahn-Teller distortion in PrO2

Philip Pattison

We report neutron diffraction data on single crystal PrO2 which reveal a cooperative Jahn-Teller distortion at TD=120±2 K. Below this temperature an internal distortion of the oxygen sublattice causes the unit cell of the crystallographic structure to beco ...

2004

Longitudinal-neutron-polarization-analysis study of the spin dynamics in Sr14Cu24O41

Henrik Moodysson Rønnow

The crystallographic structure of the cuprate Sr14Cu24O41 is a misfit stacking of layers of two distinct quantum-spin systems: linear edge-sharing CuO2 chains and 2-leg Cu2O3 spin-ladders. Interestingly, the CuO2-chains contain a large amount of holes whic ...

2004

Natural NaAlSi3O8-hollandite in the shocked Sixiangkou meteorite

Philippe Gillet

The hollandite high-pressure polymorph of plagioclase has been identified in shock-induced melt veins of the Sixiangkou 16 chondrite. It is intimately intergrown with feldspathic glass within grains previously thought to be "maskelynite." The crystallograp ...

2000